tree-wide: drop assert.h includes

We provide an independent reimplementation in macro.h, and that's the one
we want to use. Including the system header is unnecessary and confusing.

src/basic/macro.h

@@ -19,7 +19,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <assert.h>
 #include <inttypes.h>
 #include <stdbool.h>
 #include <sys/param.h>

src/boot/bootctl.c

@@ -18,7 +18,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <assert.h>
 #include <blkid.h>
 #include <ctype.h>
 #include <dirent.h>

src/journal/journal-qrcode.c

@@ -17,7 +17,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <assert.h>
 #include <errno.h>
 #include <qrencode.h>
 #include <stdbool.h>
@@ -25,6 +24,7 @@
 #include <stdlib.h>
 
 #include "journal-qrcode.h"
+#include "macro.h"
 
 #define WHITE_ON_BLACK "\033[40;37;1m"
 #define NORMAL "\033[0m"

src/libsystemd-network/test-ipv4ll.c

@@ -17,7 +17,6 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-#include <assert.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>